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The Homebuilt Pneumatic Weapon System

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#1
No ammo shortage for the DIY pneumatic gun builder. These home made air weapons range from basement target toys to ultra high pressure killers. I'll post pictures of mine tomorrow night after I finish some design tweaking. So far the power is impressive, my ammo is 3 inch decking nails. At 20 yards (and 100 psi) my little air gun blast the nails thru the side of a steel burn barrel, at 30 yards it lodges the nails to a white oak and I need a claw hammer to retrieve them, most the nails are bent from the impact. Quite deadly.

I have several other test to do, including using it to shoot steel bearings, field arrows, crossbow bolts and fishing arrows.


air-gun1.jpg

bb-assembled.jpg

2h34dvl.jpg

AFullBore-PCP-AirRifle-side.jpg
 

newmisty

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#2
Those are pretty bad azz looking! Looking forward to more pics.
 

Eat Beef

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#5
So, it's a single shot that might generate the muzzle energy of a 22 short?
 

Ragnarok

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#6
Great. Now I won't be able to put in a sprinkler system, fix my house plumbing, or buy an air nailer to fix my roof without a permit and background check. :bear_angry:

Seriously though, pneumatic weapons might be the last resort. I have a home-built PVC pneumatic potato gun that can fire a 2 ounce spud chunk at about 350fps at +-100psi, problem is there's no fast reloading. The piston-style design really works great for the larger calibers. Smaller calibers need much higher pressures to impart the desired higher speed/kinetic energy to the projectile.

Check out some of these (larger) designs: http://www.spudtech.com/products.asp especially the (propane/O2 powered) "SP9004" at http://www.spudtech.com/detail.asp?id=51 and the "Rapid Fire Carnival Cannon" at http://www.spudtech.com/detail.asp?id=51

Of course, if high powered pneumatics (of any caliber) become commonplace they might also become candidates for regulation/outlawing.

R.
 
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oldgaranddad

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#7
NY just called. Andrew Cuomo just had plumbing pipe over 7 inches banned (10 inches is OK for now but you can only fill 7 inches).
 
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#8
So, it's a single shot that might generate the muzzle energy of a 22 short?

Its a single shot with the muzzle energy of 40 to 300 ft lbs pending pressure and projectile. This is not a self defense weapon, its a small game getter and maybe a good pneumatic fishing arrow spear gun. It has real good prospects as a gigging gun.

Mine is relatively quiet compared to the QEV guns because my lightweight nailer uses a butterfly valve instead of a QEV diaphram or piston.

I'm using an aluminum fuel bottle as pressure canister with a full port ball valve as safety and the butterfly valve as trigger.

1/2 inch pipe bore (50 cal) the PVC barrel is super lightweight but the long copper barrel is more accurate, the Red Dot helps.
 

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#9
This kid with a soda bottle gun shoots a field point arrow, imagine what a broad head hunting arrow would do ....


 
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<SLV>

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#10
The concept has been around for a while:

 
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newmisty

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#13
Ammo is cheap as heck too. Ring shanks ain't no hollow piercing'round but they'd be heII to have to pull out! :bear_laugh:
 
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#14
Careful with shot placement, I've already got one of these guys pinned 20 foot up a white oak.

Best to take a side shot or you'll be getting out the extension ladder to retrieve your game.


SANY7406.JPG
 

Unclad Lad

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#15
As a portable weapon, it has some good applications, but I think it could be the basis for a very deadly fixed-point defense.

Picture such a device hooked up to a high-pressure tank where the air is constantly replaced by a compressor-powered generator. It could fire anything from a steel ball bearing or a lead Minie ball to special sabot rounds. It could even be aimed remotely. Since the shots are powered externally (not like a modern cartridge), there will be some tradeoffs between muzzle velocity, bullet weight, and rate of fire, but given enough tank capacity an opening salvo could have catastrophic results for whatever is downrange.